Answers are grounded in this paper and cite their sources.
An a.c. Mueller bridge set for resistance thermometry at cryogenic temperature is described. A commercial tuned null detector is used at an operating frequency of 1025 c/s. The set includes a high stability oscillator, line reject filter, phase shifter, Q multiplier and selector box. The latter permits the dissipation in the thermometers not being measured to be maintained at the operating level with direct current. A temperature change of the order of 10 μdegK can be detected with 10 -8 W applied to the thermometer.
No takes yet. Share an insight, caveat, or question.
J.M. Diamond (1966) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: